/*
 * Copyright (c) 2009, 2010, 2011, 2012, 2013, B3log Team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
(function(a,b,c){var d=b.event,e;d.special.smartresize={setup:function(){b(this).bind("resize",d.special.smartresize.handler)},teardown:function(){b(this).unbind("resize",d.special.smartresize.handler)},handler:function(a,b){var c=this,d=arguments;a.type="smartresize",e&&clearTimeout(e),e=setTimeout(function(){jQuery.event.handle.apply(c,d)},b==="execAsap"?0:100)}},b.fn.smartresize=function(a){return a?this.bind("smartresize",a):this.trigger("smartresize",["execAsap"])},b.Mason=function(a,c){this.element=b(c),this._create(a),this._init()};var f=["position","height"];b.Mason.settings={isResizable:!0,isAnimated:!1,animationOptions:{queue:!1,duration:500},gutterWidth:0,isRTL:!1,isFitWidth:!1},b.Mason.prototype={_filterFindBricks:function(a){var b=this.options.itemSelector;return b?a.filter(b).add(a.find(b)):a},_getBricks:function(a){var b=this._filterFindBricks(a).css({position:"absolute"}).addClass("masonry-brick");return b},_create:function(c){this.options=b.extend(!0,{},b.Mason.settings,c),this.styleQueue=[],this.reloadItems();var d=this.element[0].style;this.originalStyle={};for(var e=0,g=f.length;e<g;e++){var h=f[e];this.originalStyle[h]=d[h]||""}this.element.css({position:"relative"}),this.horizontalDirection=this.options.isRTL?"right":"left",this.offset={};var i=b(document.createElement("div"));this.element.prepend(i),this.offset.y=Math.round(i.position().top),this.options.isRTL?(i.css({"float":"right",display:"inline-block"}),this.offset.x=Math.round(this.element.outerWidth()-i.position().left)):this.offset.x=Math.round(i.position().left),i.remove();var j=this;setTimeout(function(){j.element.addClass("masonry")},0),this.options.isResizable&&b(a).bind("smartresize.masonry",function(){j.resize()})},_init:function(a){this._getColumns(),this._reLayout(a)},option:function(a,c){b.isPlainObject(a)&&(this.options=b.extend(!0,this.options,a))},layout:function(a,c){var d,e,f,g,h,i;for(var j=0,k=a.length;j<k;j++){d=b(a[j]),e=Math.ceil(d.outerWidth(!0)/this.columnWidth),e=Math.min(e,this.cols);if(e===1)this._placeBrick(d,this.colYs);else{f=this.cols+1-e,g=[];for(i=0;i<f;i++)h=this.colYs.slice(i,i+e),g[i]=Math.max.apply(Math,h);this._placeBrick(d,g)}}var l={};l.height=Math.max.apply(Math,this.colYs)-this.offset.y;if(this.options.isFitWidth){var m=0,j=this.cols;while(--j){if(this.colYs[j]!==this.offset.y)break;m++}l.width=(this.cols-m)*this.columnWidth-this.options.gutterWidth}this.styleQueue.push({$el:this.element,style:l});var n=this.isLaidOut?this.options.isAnimated?"animate":"css":"css",o=this.options.animationOptions,p;for(j=0,k=this.styleQueue.length;j<k;j++)p=this.styleQueue[j],p.$el[n](p.style,o);this.styleQueue=[],c&&c.call(a),this.isLaidOut=!0},_getColumns:function(){var a=this.options.isFitWidth?this.element.parent():this.element,b=a.width();this.columnWidth=this.options.columnWidth||this.$bricks.outerWidth(!0)||b,this.columnWidth+=this.options.gutterWidth,this.cols=Math.floor((b+this.options.gutterWidth)/this.columnWidth),this.cols=Math.max(this.cols,1)},_placeBrick:function(a,b){var c=Math.min.apply(Math,b),d=0;for(var e=0,f=b.length;e<f;e++)if(b[e]===c){d=e;break}var g={top:c};g[this.horizontalDirection]=this.columnWidth*d+this.offset.x,this.styleQueue.push({$el:a,style:g});var h=c+a.outerHeight(!0),i=this.cols+1-f;for(e=0;e<i;e++)this.colYs[d+e]=h},resize:function(){var a=this.cols;this._getColumns(),this.cols!==a&&this._reLayout()},_reLayout:function(a){var b=this.cols;this.colYs=[];while(b--)this.colYs.push(this.offset.y);this.layout(this.$bricks,a)},reloadItems:function(){this.$bricks=this._getBricks(this.element.children())},reload:function(a){this.reloadItems(),this._init(a)},appended:function(a,b,c){if(b){this._filterFindBricks(a).css({top:this.element.height()});var d=this;setTimeout(function(){d._appended(a,c)},1)}else this._appended(a,c)},_appended:function(a,b){var c=this._getBricks(a);this.$bricks=this.$bricks.add(c),this.layout(c,b)},remove:function(a){this.$bricks=this.$bricks.not(a),a.remove()},destroy:function(){this.$bricks.removeClass("masonry-brick").each(function(){this.style.position="",this.style.top="",this.style.left=""});var c=this.element[0].style;for(var d=0,e=f.length;d<e;d++){var g=f[d];c[g]=this.originalStyle[g]}this.element.unbind(".masonry").removeClass("masonry").removeData("masonry"),b(a).unbind(".masonry")}},b.fn.imagesLoaded=function(a){function h(){--e<=0&&this.src!==f&&(setTimeout(g),d.unbind("load error",h))}function g(){a.call(b,d)}var b=this,d=b.find("img").add(b.filter("img")),e=d.length,f="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==";e||g(),d.bind("load error",h).each(function(){if(this.complete||this.complete===c){var a=this.src;this.src=f,this.src=a}});return b};var g=function(a){this.console&&console.error(a)};b.fn.masonry=function(a){if(typeof a=="string"){var c=Array.prototype.slice.call(arguments,1);this.each(function(){var d=b.data(this,"masonry");if(!d)g("cannot call methods on masonry prior to initialization; attempted to call method '"+a+"'");else{if(!b.isFunction(d[a])||a.charAt(0)==="_"){g("no such method '"+a+"' for masonry instance");return}d[a].apply(d,c)}})}else this.each(function(){var c=b.data(this,"masonry");c?(c.option(a||{}),c._init()):b.data(this,"masonry",new b.Mason(a,this))});return this}})(window,jQuery);